1. #1
    RoyT's Avatar
    Lives in Plymouth, United Kingdom. Last Activity: 12-12-2014 Has been a member for 3-4 years. Has a total post count of 6.
    Hi

    I have a small desktop cnc - Chinese cnc 3040 - and i want to attach a small flexible vacuum hose as a dust collector to the spindle assembly.

    Is it ok to use some small but VERY strong Neodymium magnets screwed to the aluminum heat sink holding the spindle motor ? or will this affect the motor coils etc.

    The machine is not really big enough for a dedicated dust boot.

    Thanks

    Roy

  2. #2
    I think that will be okay, it's a method used by many people. Velcro might be another idea if you don't fancy the magnets.
    Spelling mistakes are not intentional, I only seem to see them some time after I've posted

  3. #3
    RoyT's Avatar
    Lives in Plymouth, United Kingdom. Last Activity: 12-12-2014 Has been a member for 3-4 years. Has a total post count of 6.
    Thanks EddyCurrent
    I have seen magnets used on frame below spindle but not on the heat sink next to the spindle

    I will try it and report back here if I get a problem

  4. #4
    Air is a very poor conductor of magnetic flux and aluminium is not much different, so very little will penetrate the short distance to the electrical steel inside the motor. The flux density in the outside of the stator (the 'back iron') is generally low, so increasing a it a little shouldn't increase the losses in the motor noticeably.
    Old router build log here. New router build log here. Lathe build log here.
    Electric motorbike project here.

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